Your Attic May Contain More Than Insulation
Some homes have HVAC ducts running through an unconditioned attic.
Those ducts can carry:
- Heated air in winter
- Cooled air in summer
while the attic around them may be extremely hot or cold.
Why Insulate the Ducts?
Duct insulation helps reduce heat transfer between the conditioned air inside the duct and the attic outside it.
Air Sealing Comes First
An insulated leaking duct is still a leaking duct.
Connections should be properly sealed using appropriate HVAC methods before insulation is relied upon.
Can Blown-In Insulation Simply Cover Every Duct?
The correct approach depends on:
- Duct location
- Duct type
- Existing insulation
- HVAC design
Do not assume burying a problem under loose fill is the same as properly insulating and sealing the duct.
Why Condensation Matters
Cold supply ducts in a hot, humid environment can be vulnerable to condensation if insulation and vapour control are poor.
Keep the Air in the Duct—and Control the Temperature Around It.
Envirotech Exteriors can assess the attic insulation layout and identify when HVAC duct conditions should be coordinated with the appropriate trade before a top-up.